Evaluation of mercury sorbents in a lab-scale multiphase flow reactor, a pilot-scale slipstream reactor and full-scale power plant

Wu, Jihuai; Cao, Yan; Pan, Weiguo; Shen, Minqiang; Ren, Jianxing; Du, Yunfei; He, Ping; Wei, Du; Xu, Jingjing; Wu, Andy; Li, Songgeng; Lu, Ping; Pan, Wei

doi:10.1016/j.ces.2007.09.041

Cited by 32 publications

(22 citation statements)

References 4 publications

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“…Sorbent injection upstream of the ESP (Electrostatic Precipitator) or bag-house is one of the recommended methods to reduce mercury emission. It has been shown in previous work [5,6] that its main principle is that sorbent acts on the mercury and captures mercury. The sorbent capturing the mercury enters the ESP with the fly ash so as to reduce the mercury emission to the environment.…”

Section: Introductionmentioning

confidence: 99%

Notice of Retraction: Study on flow characteristics in a novel multiphase reactor and its effect on mercury removal efficiency in the flue gas

Pan

et al. 2010

2010 2nd International Conference on Computer Engineering and Technology

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A novel multiphase reactor was established to experimentally study the flow characteristics in the duct at a power station and its effect on the mercury speciation distribution in flue gas and mercury removal efficiency. The simulated flue gas carrying mercury generated with special mercury generator enters into the reactor at different rates to simulate the flow field in different APCDs duct at power station. The studied results have demonstrated that different flow characteristics in the reactor affect the mercury speciation distribution in the flue gas, and it also affects the mercury efficiency of the mercury sorbent and fly ash. The possible reasons are that different flow characteristics makes the contents in the flue gas be with different resident time in the reactor and affects the chemical reaction between the contents with mercury, so that mercury speciation distribution in flue gas changes. The results will not only help understand the principle that flow characteristics affects the mercury speciation distribution and mercury removal efficiency by absorbent and fly ash in the flue gas, but also help improve mercury removal efficiency through optimizing the flow field in the duct so as to reduce mercury pollution emission in the flue gas.

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Section: Introductionmentioning

confidence: 99%

Notice of Retraction: Study on flow characteristics in a novel multiphase reactor and its effect on mercury removal efficiency in the flue gas

Pan

et al. 2010

2010 2nd International Conference on Computer Engineering and Technology

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“…and their oxides and sulfides, calcium species (lime) and zeolites [5][6][7][8][9][10][11][12]. However most of these sorbents are less effective at higher temperature, have low capacities, cannot be regenerated and are easily deactivated by flue gas components such as sulfur oxides (SOx) [13][14], which means that the search for the ideal mercury sorbent is far from over [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of mercury removal from exhaust gases

Wdowin

Wiatros-Motyka

Panek

et al. 2014

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An initial study has been made of the use of synthetic zeolites for mercury capture from exhaust gases. Synthetic zeolites (Na-X and Na-P1), and for comparison a natural zeolite (clinoptilolite) and activated carbon with bromine (AC/Br) were tested for mercury uptake from a gaseous stream. The materials were subjected to mercury adsorption tests and their thermal stability was evaluated. The untreated synthetic zeolites had negligible mercury uptake, but after impregnation with silver, the adsorption of mercury was markedly improved.The synthetic zeolite Na-X impregnated with silver adsorbed significantly more mercury before breakthrough than the activated carbon impregnated with bromine, indicating the potential of zeolite derived from coal fly ash as a new sorbent for capture of mercury from flue gases.

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“…This may be because there was still some residual sorbent remaining in the reactor to capture mercury after the sorbent adding was stopped. To describe the phenomena, maximum and minimum mercury adsorption efficiency can be defined as [12] % 100 ) (…”

Section: Experimental Evaluation Methodsmentioning

confidence: 99%

Evaluation Study on New Sorbents for Mercury in Coal-Fired Flue Gas

Zhang

Pan

et al. 2010

2010 4th International Conference on Bioinformatics and Biomedical Engineering

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More and more concern has been put on the mercury emitted from power stations burning coal because of its harm to human health. Both of the US EPA and European Commission have set regulations on the mercury emission from the electric utilities. China also pays more and more attention to the mercury emission and starts to sponsor the projects relative to the mercury emission and its control. Mercury emission control technologies may be divided into three classes, i.e., precombustion control, combustion control and flue gas control, among which the flue gas mercury removal technology is most widely used. The existed flue gas pollution control devices such as bag filter, electrostatic precipitator and wet FGD may remove the oxidized mercury from the flue gas. However, they have no obvious removal efficiency on the elemental mercury. The main direction in the development of new mercury removal technology is to transform the element of mercury into oxidized mercury and particulate-bounded mercury, which may be effectively removed. Before the sorbent is used to remove mercury from the flue gas, it needs to be evaluated on a lab-scale device, pilot-scale and full scale reactor or power station. The simulated flue gas composed of mercury vapors from the vapor generator and compressed air was used to conduct the experiment on removal of Hg in the sorbent evaluation test-bed in order to research different sorbents for the mercury removal efficiency. The experimental results indicate that the mercury removal efficiency of activated carbon is 60%; while fly ash is of low cost and its efficiency is limited. Unmodified fly ash adsorption efficiency is from 10% to 20%, and the specific surface area of modified fly ash has been increased a lot, and its adsorption efficiency can reach up to 25%, but it is far from the adsorption efficiency of activated carbon. The activated carbon is with higher mercury removal efficiency than fly ash, but its cost is very high. It is one of the studying directions to find high effective cheap sorbents.Keywords-mercury in the flue gas, fly ash, activated carbon, sorbent

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Evaluation of mercury sorbents in a lab-scale multiphase flow reactor, a pilot-scale slipstream reactor and full-scale power plant

Cited by 32 publications

References 4 publications

Notice of Retraction: Study on flow characteristics in a novel multiphase reactor and its effect on mercury removal efficiency in the flue gas

Notice of Retraction: Study on flow characteristics in a novel multiphase reactor and its effect on mercury removal efficiency in the flue gas

Experimental study of mercury removal from exhaust gases

Evaluation Study on New Sorbents for Mercury in Coal-Fired Flue Gas

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